Răspuns:
Explicație pas cu pas:
a)
5x - 2 = 2x + 7
5x - 2x = 7 + 2
3x = 9
x = 3
_____________
b)
3x + 5 = 4x - 8
4x - 3x = 5 + 8
x = 13
c)
6 - 2x = -7x + 21
7x - 2x = 21 - 6
5x = 15
d)
-4x + 5 = 4x - 27
4x + 4x = 5 + 27
8x = 32
x = 4
______________
e)
-2x + 5 = -3x + 4
3x - 2x = 4 - 5
x = -1
f)
-8 - 14x = 2x - 8
14x + 2x = -8 + 8
16x = 0
x = 0
